Make one half of image transparent

[ONiel]

Again a problem which should be so easy to do, and IS easy to do in software like GIMP or Photoshop... but seems impossible in Affinity Designer..

I have a white background with a stripe in the middle. Everything right from the stripe should be transparent, everything left should be white. I tried using the selector brush on the right part and pressed 'Delete' but that did not work.

File in attachments, I am curious how this is done in Affinity...

transparent.afdesign

[RM f/g]

like this?

In Document Setup > Colour click 'transparent background'

transparent2.afdesign

[Lee_T]

Hi ONiel, 

I think this small tutorial on how to use our dedicated Transparency Tool will give you all the info you need, I think you'll find it a pretty powerful feature.

Lee

[R C-R]

3 hours ago, ONiel said:

I have a white background with a stripe in the middle.

No, what you have is an image layer derived from a png image that has a transparent (not white!) background. So like @RM f/g suggested, if you change the document background to transparent, you will see that the stripe layer has no background.

[Lee_T]

4 hours ago, ONiel said:

Again a problem which should be so easy to do, and IS easy to do in software like GIMP or Photoshop... but seems impossible in Affinity Designer..

I have a white background with a stripe in the middle. Everything right from the stripe should be transparent, everything left should be white. I tried using the selector brush on the right part and pressed 'Delete' but that did not work.

File in attachments, I am curious how this is done in Affinity...

transparent.afdesign

I should have said, but your image is a transparent one itself, (personally i'd recreate these simple shapes with vectors) but if you really want to keep them, just draw a shape on the left hand side to cover make it opaque.

I'd also suggest when working in a vector design program when you wish to have transparency for your output, to lay an image or something in the bottom layer to toggle on/off so you know what's transparent and not.

[thomaso]

On 7/15/2022 at 2:38 PM, ONiel said:

I have a white background with a stripe in the middle. Everything right from the stripe should be transparent,

Additionally to what was mentioned already about transparency in your file: Beyond masking, a very quick and simple way to achieve non-destructive transparency is using an object or pixel layer with Blend Mode set to Erase. Its erasing hierarchy can get limited by nesting / grouping.